diff options
Diffstat (limited to 'host/lib/rfnoc')
| -rw-r--r-- | host/lib/rfnoc/graph_impl.cpp | 17 | ||||
| -rw-r--r-- | host/lib/rfnoc/source_block_ctrl_base.cpp | 6 |
2 files changed, 15 insertions, 8 deletions
diff --git a/host/lib/rfnoc/graph_impl.cpp b/host/lib/rfnoc/graph_impl.cpp index 989bcb0c4..326e9205d 100644 --- a/host/lib/rfnoc/graph_impl.cpp +++ b/host/lib/rfnoc/graph_impl.cpp @@ -120,17 +120,17 @@ void graph_impl::connect(const block_id_t& src_block, % dst->get_block_id().get() % (dst->get_fifo_size(dst_block_port) / 1024) % (pkt_size / 1024) % src->get_block_id().get())); } + const bool same_xbar = sid.get_src_addr() == sid.get_dst_addr(); src->configure_flow_control_out(true, /* enable output */ + same_xbar, // Lossless link if on same crossbar buf_size_bytes, 0, /* no packet limit. We need to revisit this at some point. */ src_block_port); // On the same crossbar, use lots of FC packets - size_t bytes_per_response = - buf_size_bytes / uhd::rfnoc::DEFAULT_FC_XBAR_RESPONSE_FREQ; // Over the network, use less or we'd flood the transport - if (sid.get_src_addr() != sid.get_dst_addr()) { - bytes_per_response = buf_size_bytes / uhd::rfnoc::DEFAULT_FC_TX_RESPONSE_FREQ; - } + const size_t bytes_per_response = + same_xbar ? buf_size_bytes / uhd::rfnoc::DEFAULT_FC_XBAR_RESPONSE_FREQ + : buf_size_bytes / uhd::rfnoc::DEFAULT_FC_TX_RESPONSE_FREQ; UHD_ASSERT_THROW(bytes_per_response != 0); dst->configure_flow_control_in(bytes_per_response, dst_block_port); @@ -189,7 +189,12 @@ void graph_impl::connect_src(const block_id_t& src_block, % (buf_size_dst_bytes / 1024) % (pkt_size / 1024) % src->get_block_id().get())); } - src->configure_flow_control_out(buf_size_pkts, src_block_port); + + src->configure_flow_control_out(true, /* enable output */ + (dst_sid.get_src_addr() == dst_sid.get_dst_addr()), + buf_size_dst_bytes, + 0, /* no packet limit. We need to revisit this at some point. */ + src_block_port); } void graph_impl::connect_sink( diff --git a/host/lib/rfnoc/source_block_ctrl_base.cpp b/host/lib/rfnoc/source_block_ctrl_base.cpp index 6c41fae14..656ab26af 100644 --- a/host/lib/rfnoc/source_block_ctrl_base.cpp +++ b/host/lib/rfnoc/source_block_ctrl_base.cpp @@ -86,6 +86,7 @@ void source_block_ctrl_base::set_destination( } void source_block_ctrl_base::configure_flow_control_out(const bool enable_fc_output, + const bool lossless_link, const size_t buf_size_bytes, const size_t pkt_limit, const size_t block_port, @@ -124,8 +125,9 @@ void source_block_ctrl_base::configure_flow_control_out(const bool enable_fc_out // count based flow control const bool enable_byte_fc = (buf_size_bytes != 0); const bool enable_pkt_cnt_fc = (pkt_limit != 0); - const uint32_t config = (enable_fc_output ? 1 : 0) | (enable_byte_fc << 1) - | (enable_pkt_cnt_fc << 2); + const uint32_t config = (enable_fc_output ? 1 : 0) | ((enable_byte_fc ? 1 : 0) << 1) + | ((enable_pkt_cnt_fc ? 1 : 0) << 2) + | ((lossless_link ? 1 : 0) << 3); // Resize the FC window. // Precondition: No data can be buffered upstream. |